A bird sitting on a tree flies away as you walk by. Which of the characteristics explains the bird's behavior?

You have a block of dry ice (-40°C), an ice cube (-5°C) and alcohol (15°C). In which one do molecules move the fastest? A. Ice Cube B. Dry Ice C. Water D. Alcohol

What trend does the atomic radius follow along a period on the periodic table? A. The atomic radius gets smaller the farther right it appears on the periodic table. B. The atomic radius gets larger the farther right it appears on the periodic table.

372x75*46+1*57*38+8=

What is true about a system in chemical equilibrium? No reactants remain in the system. The amount of product equals the amount of reactant. The amount of reactant changes, but over time remains about the same. There are no products in the system.

What is the specific heat of a substance if 1560 cal are required to raise temperature of a 312 g substance by 15 degrees celsius?

If heat energy is absorbed by the system during a chemical reaction, the reaction is said to be

A chemist has evolved a certain substance in water the chemist knows that more the substance could be dissolved into the water before it stops dissolving therefore the current solution is

Be sure to answer all parts. The combustion of a 40.0-g gaseous mixture of H2 and CH4 releases 3766 kJ of heat. Calculate the amount of each gas in grams.

Global warming can be slowed or stopped

Since 1915, chemical fertilizer has been mass produced for farming. Which of the following is the main water pollution problem caused by chemical fertilizer?